Fixed message loop thread may not start until too late (#6).

NTwain/MessageLoop.cs

@@ -1,6 +1,7 @@
 using NTwain.Triplets;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading;
@@ -27,8 +28,12 @@ namespace NTwain
         {
             if (!_started)
             {
+                // using this terrible hack so the new thread will start running before this function returns
+                var hack = new ManualResetEvent(false);
+
                 var loopThread = new Thread(new ThreadStart(() =>
                 {
+                    Debug.WriteLine("NTwain message loop started.");
                     _dispatcher = Dispatcher.CurrentDispatcher;
                     if (Dsm.IsWin)
                     {
@@ -37,11 +42,14 @@ namespace NTwain
                         // CS_NOCLOSE, WS_DISABLED, and WS_EX_NOACTIVATE
                         _dummyWindow = new HwndSource(0x0200, 0x8000000, 0x8000000, 0, 0, "NTWAIN_LOOPER", IntPtr.Zero);
                     }
+                    hack.Set();
                     Dispatcher.Run();
                 }));
                 loopThread.IsBackground = true;
                 loopThread.SetApartmentState(ApartmentState.STA);
                 loopThread.Start();
+                hack.WaitOne();
+                hack.Close();
                 _started = true;
             }
         }

NTwain/Properties/VersionInfo.cs

@@ -14,6 +14,6 @@ namespace NTwain
         // keep this same in majors releases
         public const string Release = "0.11.0.0";
         // change this for each nuget release
-        public const string Build = "0.11.0";
+        public const string Build = "0.11.1";
     }
 }

Tests/Tester.Winform/TestForm.cs

@@ -42,7 +42,6 @@ namespace Tester.Winform
             {
                 if (enc.MimeType == "image/tiff") { _tiffCodecInfo = enc; break; }
             }
-            SetupTwain();
         }
 
         protected override void OnFormClosing(FormClosingEventArgs e)
@@ -231,6 +230,10 @@ namespace Tester.Winform
 
         private void ReloadSourceList()
         {
+            if (_twain == null)
+            {
+                SetupTwain();
+            }
             if (_twain.State < 3)
             {
                 _twain.OpenManager();